In the French overseas departments and in Corsica, insular territories, as well as in Provence, s... more In the French overseas departments and in Corsica, insular territories, as well as in Provence, south of France, where the electric grid is weakly interconnected because of the proximity of the Mediterranean Sea and the Alps Mountains, a very high proportion of photovoltaic power will be introduced in the electric grids in the near future. In order to manage the balance between supply and demand of electricity, grid operators ask electricity producers to linearize their production and to announce in advance their energy production plans. The accuracy of these plans depends strongly on the accuracy of the prediction of the solar resource. The article proposes a new method for the benchmarking of irradiance predictions used in this context. It is shown that even for perfect energy predictions, the requirement of energy production plans brings potential costs to energy producers. The new benchmarking method compares the accuracy of the predictions with the accuracy of an ideal prediction made from the linearization of irradiance measurements and with the accuracy of the persistence prediction, which consists in using the irradiance of the current day as predicted irradiance for the next day.
corse.fr Abstract - Theobject ofthis study istoanalyze themainfactors havingimpacton thevoltage p... more corse.fr Abstract - Theobject ofthis study istoanalyze themainfactors havingimpacton thevoltage profile ofthedistribution networksformedium voltagewhen swithing on the decentralized sources withdifferent power (asproduced by renewable energy systems)
The objective of this paper is to present the modelling and experimental validation of the 46 kW ... more The objective of this paper is to present the modelling and experimental validation of the 46 kW PEM high pressure water electrolyzer installed on the MYRTE platform, which is a real-scale demonstrator that aims to study the deployment of hydrogen to store the energy associated to intermittent renewable energy source systems. An electrochemical steady-state and semi-empirical submodel coupled with a lumped thermal capacitance dynamic submodel is developed to predict the stack voltage and the stack temperature evolution from instantaneous operating conditions such as the applied current, the gas storage pressure tanks (H 2 and O 2) and the ambient temperature. The Particle Swarm Optimization algorithm is used to find the electrochemical submodel parameters and a multivariable Matlab-Simulink ® linked modular mathematical model is developed for validation. Results indicate that within a temperature range of 20e60 C, and a pressure range of 15e35 bar, the stack voltage and the temperature evolution can be predicted even in transitory operating phases. The strategy used for the parameters identification is explained in detail and can be applied to any PEM water electrolyzer.
This article introduces an implementation of an insulated alternative energy system. The objectiv... more This article introduces an implementation of an insulated alternative energy system. The objective of the study is the analysis of energy generation in communities that are located in insulated areas. The study focuses on the development of a photovoltaic hybrid microgrid, with storage in stationary lead-acid batteries and energy from fuel cell. The photovoltaic hybrid microgrid must be sized to produce enough energy to supply to a community of houses. This study attempts to elaborate a standard computational simulation method using the Matlab® Platform, to size the system independent of region, but taking the impact of local global irradiance, air temperature, and the energetic demand into consideration. This simulation type allows an estimation of the photovoltaic power to be installed and the nominal battery capacity.
2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium, 2009
This paper presents the simulation of electrical loads from consumers and from a distributed gene... more This paper presents the simulation of electrical loads from consumers and from a distributed generation (DG) in network nodes in using a neural network method and an algorithm of feed-forward neural networks. The factor ‘time’ is the unique independent value, which influences the studied parameter. In the algorithm, we introduce a process for the stability of the equilibrium of impulsive delay neural networks. We compare the results obtained by the simulation of electrical loads using artificial neural networks and by the statistical method of the exponential equalization.
2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium, 2009
We realized a reliability study of electrical network with decentralized production in using Mark... more We realized a reliability study of electrical network with decentralized production in using Markov process. The reliability index takes into account the availability of the decentralized production, the ability to provide electricity to users of the network branch and of the probability of a damage starting. The Markov graphs are used to model Medium Voltage branches with connected wind turbines and Low Voltage branches with photovoltaic arrays. The results of reliability index of the electrical network are shown.
Proceedings of the International Conference on Energy and Sustainable Development: Issues and Strategies (ESD 2010), 2010
... A stand-alone renewable energy system based on hydrogen production from wind and solar energy... more ... A stand-alone renewable energy system based on hydrogen production from wind and solar energy was developed ... PEPlTE represents the previous step for the MYRTE project corresponding to the implementation of a large PV/H2 plant in Corsica. ...
The electricity produced by photovoltaic sources is mainly influenced by the solar irradiance and... more The electricity produced by photovoltaic sources is mainly influenced by the solar irradiance and temperature of the cells. The literature presents methods to estimate these parameters through the measurements of open-circuit voltage and short-circuit current of the array. However, in an actual photovoltaic system, changing the operating point of the module to short circuit or open circuit requires the array to be disconnected from the inverter, thus causing an impact on the electrical energy production. Such a problem could be avoided if the irradiance and the cell temperature were computed by means of the maximum power point coordinates, which is the focus of this article. To perform the calculation of the irradiance and the temperature of a photovoltaic module, a study of the relationship between the electric parameters and the operating conditions has been carried out. This concerns the modeling of the photovoltaic cell with respect to the identification and translation of parameters. In addition, IEC-60 891, which proposes equations for the voltage and current translation of photovoltaic generators, has been considered. Finally, application and performance evaluation of a new equation using the thermal coefficient of power, which relates the maximum power to the irradiance and cell temperature, is also presented. Experimental verification of the methods has been carried out, presenting consistent results.
Abstract:-Artificial intelligence techniques are more and more used as alternative approaches as ... more Abstract:-Artificial intelligence techniques are more and more used as alternative approaches as prediction conventional techniques or as components of integrated systems. In this paper, we present a methodology for the prediction of daily and hourly global solar irradiation on a horizontal surface located in the mountainous island of Corsica. Our aim is to estimate and to manage photovoltaic power plants production connected to an electrical network. We use an Artificial Neural Networks (ANN) with a pre-treatment of the time ...
We study various time series of surface layer wind velocity at different locations and provide ev... more We study various time series of surface layer wind velocity at different locations and provide evidences for the intermittent nature of the wind fluctuations in mesoscale range. By means of the magnitude covariance analysis, which is shown to be a more efficient tool to study intermittency than classical scaling analysis, we find that all wind series exhibit similar features than those observed for laboratory turbulence. Our findings suggest the existence of a "universal" cascade mechanism associated with the energy transfer between synoptic motions and turbulent microscales in the atmospheric boundary layer.
Les energies et plus particulierement les energies renouvelables sont un des elements cles du dev... more Les energies et plus particulierement les energies renouvelables sont un des elements cles du developpement soutenable aujourd'hui en plein expansion. Cette problematique est encore plus sensible dans les regions insulaires. Le chapitre 17 de l'Agenda 21 (Conference de Rio, 1992) stipule que les iles sont des cas particuliers a la fois d'un point de vue environnemental et de leur developpement. Elles ont des problemes specifiques et sont extremement fragiles et vulnerables. Dans le contexte actuel du developpement durable, l'energie est la pierre angulaire de leur strategie de planification. En milieu insulaire, les contraintes habituelles dans le domaine de l'energie sont la distance aux reseaux principaux, la petite echelle, les difficultes de distribution et l'absence de grands marches traditionnels. Ces contraintes sont en general contrebalancees par l'extreme abondance des sources renouvelables d'energie et l'incroyable adaptabilite et capaci...
From 1972 and the Meadows report to 1997 and the ratification of the Kyoto Protocol by most of th... more From 1972 and the Meadows report to 1997 and the ratification of the Kyoto Protocol by most of the countries in the world, the global energy policy framework has undergone a paradigm shift, as human societies have been leaving aside the sole economic growth to embrace the broader concept of sustainable development. As new electrification vectors, modern renewable power systems, such as solar PV, have sprung up in the wake of this major mutation and have typically been following an exponential growth since the mid-nineties. Electricity as well as its lack indeed holds a central position within the human development apparatus, from highly interconnected centralized power networks reaching 100 % of the population in developed countries, to the almost 500 millions people without access to electricity in the multidimensionally poor rural areas of Sub-Saharan Africa. The encounter of the worldwide energy context being changed with each of these specific social-energy paradigms has ended up considering two strategies for integrating renewable resources in power systems: the grid-connected architecture for meeting the sustainable development requirements, and the rural off-grid electrification for settling the lack of human development. By means of a historical and cross-sectional overview, we depict here the ins and outs of this protean pattern and, using the case of solar PV, analyze how it has eventually affected the development and sustainability of renewable power systems in Sub-Saharan Africa.
In the French overseas departments and in Corsica, insular territories, as well as in Provence, s... more In the French overseas departments and in Corsica, insular territories, as well as in Provence, south of France, where the electric grid is weakly interconnected because of the proximity of the Mediterranean Sea and the Alps Mountains, a very high proportion of photovoltaic power will be introduced in the electric grids in the near future. In order to manage the balance between supply and demand of electricity, grid operators ask electricity producers to linearize their production and to announce in advance their energy production plans. The accuracy of these plans depends strongly on the accuracy of the prediction of the solar resource. The article proposes a new method for the benchmarking of irradiance predictions used in this context. It is shown that even for perfect energy predictions, the requirement of energy production plans brings potential costs to energy producers. The new benchmarking method compares the accuracy of the predictions with the accuracy of an ideal prediction made from the linearization of irradiance measurements and with the accuracy of the persistence prediction, which consists in using the irradiance of the current day as predicted irradiance for the next day.
corse.fr Abstract - Theobject ofthis study istoanalyze themainfactors havingimpacton thevoltage p... more corse.fr Abstract - Theobject ofthis study istoanalyze themainfactors havingimpacton thevoltage profile ofthedistribution networksformedium voltagewhen swithing on the decentralized sources withdifferent power (asproduced by renewable energy systems)
The objective of this paper is to present the modelling and experimental validation of the 46 kW ... more The objective of this paper is to present the modelling and experimental validation of the 46 kW PEM high pressure water electrolyzer installed on the MYRTE platform, which is a real-scale demonstrator that aims to study the deployment of hydrogen to store the energy associated to intermittent renewable energy source systems. An electrochemical steady-state and semi-empirical submodel coupled with a lumped thermal capacitance dynamic submodel is developed to predict the stack voltage and the stack temperature evolution from instantaneous operating conditions such as the applied current, the gas storage pressure tanks (H 2 and O 2) and the ambient temperature. The Particle Swarm Optimization algorithm is used to find the electrochemical submodel parameters and a multivariable Matlab-Simulink ® linked modular mathematical model is developed for validation. Results indicate that within a temperature range of 20e60 C, and a pressure range of 15e35 bar, the stack voltage and the temperature evolution can be predicted even in transitory operating phases. The strategy used for the parameters identification is explained in detail and can be applied to any PEM water electrolyzer.
This article introduces an implementation of an insulated alternative energy system. The objectiv... more This article introduces an implementation of an insulated alternative energy system. The objective of the study is the analysis of energy generation in communities that are located in insulated areas. The study focuses on the development of a photovoltaic hybrid microgrid, with storage in stationary lead-acid batteries and energy from fuel cell. The photovoltaic hybrid microgrid must be sized to produce enough energy to supply to a community of houses. This study attempts to elaborate a standard computational simulation method using the Matlab® Platform, to size the system independent of region, but taking the impact of local global irradiance, air temperature, and the energetic demand into consideration. This simulation type allows an estimation of the photovoltaic power to be installed and the nominal battery capacity.
2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium, 2009
This paper presents the simulation of electrical loads from consumers and from a distributed gene... more This paper presents the simulation of electrical loads from consumers and from a distributed generation (DG) in network nodes in using a neural network method and an algorithm of feed-forward neural networks. The factor ‘time’ is the unique independent value, which influences the studied parameter. In the algorithm, we introduce a process for the stability of the equilibrium of impulsive delay neural networks. We compare the results obtained by the simulation of electrical loads using artificial neural networks and by the statistical method of the exponential equalization.
2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium, 2009
We realized a reliability study of electrical network with decentralized production in using Mark... more We realized a reliability study of electrical network with decentralized production in using Markov process. The reliability index takes into account the availability of the decentralized production, the ability to provide electricity to users of the network branch and of the probability of a damage starting. The Markov graphs are used to model Medium Voltage branches with connected wind turbines and Low Voltage branches with photovoltaic arrays. The results of reliability index of the electrical network are shown.
Proceedings of the International Conference on Energy and Sustainable Development: Issues and Strategies (ESD 2010), 2010
... A stand-alone renewable energy system based on hydrogen production from wind and solar energy... more ... A stand-alone renewable energy system based on hydrogen production from wind and solar energy was developed ... PEPlTE represents the previous step for the MYRTE project corresponding to the implementation of a large PV/H2 plant in Corsica. ...
The electricity produced by photovoltaic sources is mainly influenced by the solar irradiance and... more The electricity produced by photovoltaic sources is mainly influenced by the solar irradiance and temperature of the cells. The literature presents methods to estimate these parameters through the measurements of open-circuit voltage and short-circuit current of the array. However, in an actual photovoltaic system, changing the operating point of the module to short circuit or open circuit requires the array to be disconnected from the inverter, thus causing an impact on the electrical energy production. Such a problem could be avoided if the irradiance and the cell temperature were computed by means of the maximum power point coordinates, which is the focus of this article. To perform the calculation of the irradiance and the temperature of a photovoltaic module, a study of the relationship between the electric parameters and the operating conditions has been carried out. This concerns the modeling of the photovoltaic cell with respect to the identification and translation of parameters. In addition, IEC-60 891, which proposes equations for the voltage and current translation of photovoltaic generators, has been considered. Finally, application and performance evaluation of a new equation using the thermal coefficient of power, which relates the maximum power to the irradiance and cell temperature, is also presented. Experimental verification of the methods has been carried out, presenting consistent results.
Abstract:-Artificial intelligence techniques are more and more used as alternative approaches as ... more Abstract:-Artificial intelligence techniques are more and more used as alternative approaches as prediction conventional techniques or as components of integrated systems. In this paper, we present a methodology for the prediction of daily and hourly global solar irradiation on a horizontal surface located in the mountainous island of Corsica. Our aim is to estimate and to manage photovoltaic power plants production connected to an electrical network. We use an Artificial Neural Networks (ANN) with a pre-treatment of the time ...
We study various time series of surface layer wind velocity at different locations and provide ev... more We study various time series of surface layer wind velocity at different locations and provide evidences for the intermittent nature of the wind fluctuations in mesoscale range. By means of the magnitude covariance analysis, which is shown to be a more efficient tool to study intermittency than classical scaling analysis, we find that all wind series exhibit similar features than those observed for laboratory turbulence. Our findings suggest the existence of a "universal" cascade mechanism associated with the energy transfer between synoptic motions and turbulent microscales in the atmospheric boundary layer.
Les energies et plus particulierement les energies renouvelables sont un des elements cles du dev... more Les energies et plus particulierement les energies renouvelables sont un des elements cles du developpement soutenable aujourd'hui en plein expansion. Cette problematique est encore plus sensible dans les regions insulaires. Le chapitre 17 de l'Agenda 21 (Conference de Rio, 1992) stipule que les iles sont des cas particuliers a la fois d'un point de vue environnemental et de leur developpement. Elles ont des problemes specifiques et sont extremement fragiles et vulnerables. Dans le contexte actuel du developpement durable, l'energie est la pierre angulaire de leur strategie de planification. En milieu insulaire, les contraintes habituelles dans le domaine de l'energie sont la distance aux reseaux principaux, la petite echelle, les difficultes de distribution et l'absence de grands marches traditionnels. Ces contraintes sont en general contrebalancees par l'extreme abondance des sources renouvelables d'energie et l'incroyable adaptabilite et capaci...
From 1972 and the Meadows report to 1997 and the ratification of the Kyoto Protocol by most of th... more From 1972 and the Meadows report to 1997 and the ratification of the Kyoto Protocol by most of the countries in the world, the global energy policy framework has undergone a paradigm shift, as human societies have been leaving aside the sole economic growth to embrace the broader concept of sustainable development. As new electrification vectors, modern renewable power systems, such as solar PV, have sprung up in the wake of this major mutation and have typically been following an exponential growth since the mid-nineties. Electricity as well as its lack indeed holds a central position within the human development apparatus, from highly interconnected centralized power networks reaching 100 % of the population in developed countries, to the almost 500 millions people without access to electricity in the multidimensionally poor rural areas of Sub-Saharan Africa. The encounter of the worldwide energy context being changed with each of these specific social-energy paradigms has ended up considering two strategies for integrating renewable resources in power systems: the grid-connected architecture for meeting the sustainable development requirements, and the rural off-grid electrification for settling the lack of human development. By means of a historical and cross-sectional overview, we depict here the ins and outs of this protean pattern and, using the case of solar PV, analyze how it has eventually affected the development and sustainability of renewable power systems in Sub-Saharan Africa.
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Papers by Philippe Poggi